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Kỳ Viện

Sente starts on a 9×9 board. Captured pieces return to your hand and may be dropped back onto the board.

Promotion and drops

Promotion is offered when a move touches the final three ranks. It is compulsory when the unpromoted piece would be unable to move again. Select a held piece to choose a legal drop square.

Forbidden drops and finish

Do not drop a second unpromoted pawn on the same file, an immobile piece, or a pawn delivering immediate mate. Fourfold repetition draws unless one side perpetually checks. The entering-king declaration uses the 27-point profile: Sente needs 28, Gote 27.

Japan Shogi Association

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